This game is pretty good, some helpful advice would be:
. Use a actual Master Chief sprite
. More alien races ( the alien sprites were pretty good )
.Graphics should improve on the stage
.And Finally all game designers use their creative minds, how about vehicles, changing guns and whatever your mind wishes that you'll think make the game more exciting. Good job!

cool

Decent game but the graphics are just too simple. More ingame instructions will be helpful

it could of been better.

eh, it was ok even though the controls were a little laggy.